What percentage of blood is made up of plasma?

Plasma constitutes about 55% of the total volume of blood in the human body. This clear, yellowish fluid serves several vital functions, including transporting nutrients, hormones, and waste products throughout the body. Additionally, plasma helps to regulate blood pressure and volume, maintain pH balance, and play a role in immune responses through the presence of antibodies and other proteins. Understanding the composition of blood, including the significance of plasma, is essential for phlebotomy technicians, as it enhances their knowledge of laboratory procedures and the interpretation of test results. The other percentages provided do not accurately represent the proportion of plasma within blood, making the understanding of the correct percentage crucial in this field.